"What we see is the Crab Nebula about 6,500 years ago, the North Star 400 years ago, the Vega Star 26 years ago, the Cowherd Star 16 years ago, feeling the warmth of the sun more than 8 minutes ago, reflecting the soft moonlight more than 1 second ago. Even if you stand in front of me, you see me 300 million seconds ago. If you want to see me at this moment, you must continue to be by my side. Shen Long recited the poem.

The young people of science and art by the lake were stunned, they didn't expect the poem to be written like this, although the language of this poem is very simple, but in their hearts, there is a unique sense of beauty.

"It's about the speed of light and time." Yes, this is the simplest physics common sense, but how can it sound so beautiful when expressed in such words?

"Inertia, it's that I'll wait for you when you leave suddenly." Shen Long read out another short poem.

"I know that beauty is fleeting and will always be a rhetoric, but at this moment I love you deeply, just like a point in the four-dimensional space-time, no matter how the coordinates are transformed, this love will not be diffused." It's a new song again.

"It's the Lorentz transformation!" Someone immediately reflected that this is the basic common sense of physics.

"Teacher Sun, let's have a few more!" Seeing Shen Long stop, the students hurriedly urged, this new style of poetry made them fascinated, and some people had already begun to ponder, should they confess to their favorite object in a while? These languages are too romantic, aren't they?

"Teacher Sun, don't just use the laws of physics, is there chemistry?" Some people are in a hurry, I'm not a physics student, and I don't understand this.

"Teacher Sun, let's have some biology!"

"Is there a math department?" More and more students came around, and they all reported their majors, wanting Shen Long to use their professional knowledge to write a poem.

"Maybe we shouldn't have met, then, at least we don't have to cry; Guess what's in chemistry? Shen Long fulfilled their wishes.

"Neutralize the reaction!" Immediately someone said, and then several chemistry students hurriedly wrote it down.

"Actually, chemistry students have a better way to confess, after all, you have your own unique language." Shen Long borrowed a pen and paper and wrote a series of symbols on the paper: h, at, tc, os, as, at, ge, nb, nb, pu, kr, y, pu, li, os, zn, li, pu, kr, y, u, tl, ag(, ga, os, pd, "like this." ”

"What does that mean?" Someone can't figure it out.

"It should be an element symbol, let me translate it, the first three elements are hydrogen, astatine and elements, oh, I see, this uses the homonym of the name of the element, the first three elements are dear, these element symbols are connected to be: dear, I love you deeply, you can't ignore me, you can't have anyone else in your heart, marry me!" That's so much fun, isn't it?

"Teacher Sun, Teacher Sun, is there any biology department!" Physics and chemistry are available, and the children in the biology department are in a hurry, and if this continues, the girls in this department will be abducted by other departments.

"The motivation for a cell to start evolving is because it takes someone to love you three billion years later." Shen Long thought for a while and replied, one song was not enough, and he came to the second one, "I would like to make an RNA, even if it is a single strand, I can have U." ”

"The first one is easy to understand, it uses the theory of evolution, and the second one means what?" Now the students of chemistry and physics are a little blind, and hurriedly pull the inquiry of the biology department.

"RNA is ribonucleic acid, which exists in biological cells and some viruses and virus-like genetic information carriers, and the vast majority of organisms are single-stranded RNA, which has Uuracil in it; This poem is a pun, the single chain refers to unrequited love, and the u in u uracil refers to you in English, that is, you! "Teacher Sun is too powerful! Can you even think of such verses?

"Teacher Sun, let's start with math!" Lu Qiujian of the Department of Mathematics raised his arms high.

"Mathematics is simpler, and mathematics itself has a beautiful language." Shen Long agreed without hesitation, "My love for you is a real number set, and I tolerate all your reasonableness and unreasonableness." ”

"Haha, the set of real numbers does contain both rational and irrational numbers." This time it was the turn of the children in the mathematics department to be happy, and by the way, they also helped to explain.

"Come, let's draw a few simple mathematical curves, y=1x, x+y=9, y=|-2x|, y=-3|sy |, what shape will these curves be?" Shen Long continued to ask.

"I'll paint, I'll paint!" The children of the mathematics department finally waited for the opportunity to be in the limelight, picked up a piece of soil on the ground, and began to draw curves on the stones, and the four mathematical curves drawn together happened to be the shape of love. ”

"Yes, there are many, but the most famous is Descartes's one, which should be expressed in polar coordinates." Shen Long wrote the formula r=a(1-sθ) on the stone, and the mathematics students immediately drew the corresponding curve, which was shaped like a heart.

Shen Long said slowly, "In 1649, on the streets of Stockholm, 52-year-old Descartes met 18-year-old Princess Christine of Sweden. A few days later, he was unexpectedly informed that the king had hired him as the little princess's math teacher. Following the guards who came to inform him to the palace, he met a girl he met on the street. From then on, he became the little princess's math teacher. ”

"The little princess's mathematics advanced by leaps and bounds under the careful guidance of Descartes, and the inseparable relationship made them fall in love with each other, the princess's father, the king, was furious when he found out, and ordered Descartes to be executed, and after the little princess Christine pleaded, the king exiled her back to France, and Princess Christine was also placed under house arrest by her father."

Soon after his return to France, Descartes fell seriously ill, and he wrote letters to the princess every day, but Christine never received Descartes' letter because he was intercepted by the king. Descartes died of exhaustion after sending Christine a thirteenth letter with a short formula: r=a(1-sθ). The king could not read it, and felt that there was not always a love talk between the two of them, and summoned all the mathematicians of the city to the palace, but none of them could unravel it, and he could not bear to watch his beloved daughter sullen all day, so he handed the letter to Christine, who had been sullen all day. ”

"Immediately drew the figure of the equation, she was very happy to see the figure, she knew that her lover still loved her, it turned out that the shape of the equation was the shape of a heart, this is the origin of the heart-shaped line."